HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Trieste

$441+ Cheap flights from Denver (DEN) to Trieste (TRS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — TRS
Apr 24 — May 11
Fri 4/24
Fri 5/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Trieste with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Denver to Trieste

Cheapest flights from Denver to Trieste
Explore the most affordable flight options available from Denver to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.

This KAYAK deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:40 pm
DEN
-
TRS
1 stop20h 45m
Lufthansa
Tue 9/296:20 am
TRS
-
DEN
1 stop17h 20m
Lufthansa
Deal found 3/23$975
This KAYAK deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 pm
DEN
-
TRS
2 stops20h 25m
Lufthansa
Thu 10/16:15 am
TRS
-
DEN
2 stops25h 40m
Lufthansa
Deal found 3/23$990
This KAYAK deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:40 pm
DEN
-
TRS
1 stop12h 15m
Lufthansa
Mon 9/282:50 pm
TRS
-
DEN
1 stop32h 50m
Lufthansa
Deal found 3/23$995
This KAYAK deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:40 pm
DEN
-
TRS
1 stop20h 45m
Lufthansa
Sun 9/276:10 am
TRS
-
DEN
2 stops25h 45m
Lufthansa
Deal found 3/23$1,045
This Cheapflightsfares deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/75:40 pm
DEN
-
TRS
1 stop20h 15m
Lufthansa
Sun 8/166:10 am
TRS
-
DEN
1 stop17h 30m
Lufthansa
Deal found 3/20$1,090
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/811:15 am
DEN
-
TRS
2 stops39h 10m
United Airlines
Thu 11/126:35 am
TRS
-
DEN
2 stops35h 48m
United Airlines
Deal found 3/23$1,111

Find flight deals from Denver to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Trieste (TRS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 25, 2026.

Round-trip from

$1,090
(Cheapflightsfares)

One-way from

$441
(Kiwi.com)
From Denver Intl to Trieste Ronchi dei Legionari
Search Deals
One-way flight from Denver Intl to Trieste Ronchi dei Legionari
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Trieste that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 25, 2026.
Use the filters below to find and compare flights from Denver to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 9/21

6:00 pm-10:25 pm

2 stops20h 25m

Trieste Ronchi dei Legionari

Thu 10/1

6:15 am-3:40 pm

1 stop17h 25m

$980

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 9/21

6:00 pm-10:25 pm

2 stops20h 25m

Trieste Ronchi dei Legionari

Mon 9/28

2:50 pm-3:40 pm

1 stop32h 50m

$1,000

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Fri 8/7

5:40 pm-9:55 pm

1 stop20h 15m

Trieste Ronchi dei Legionari

Sun 8/16

6:10 am-3:40 pm

1 stop17h 30m

$1,090

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 9/6

4:40 pm-6:30 pm

2 stops17h 50m

Trieste Ronchi dei Legionari

Sat 9/12

11:15 am-12:40 pm

2 stops33h 25m

$1,185

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sat 4/4

4:40 pm-10:55 pm

2 stops22h 15m

Trieste Ronchi dei Legionari

Wed 4/15

6:35 am-7:00 pm

2 stops44h 25m

$1,248

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 4/27

4:40 pm-10:55 pm

2 stops22h 15m

Trieste Ronchi dei Legionari

Tue 5/5

6:35 am-7:00 pm

2 stops44h 25m

$1,307

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Thu 8/27

4:40 pm-6:30 pm

2 stops17h 50m

Trieste Ronchi dei Legionari

Sun 9/6

11:15 am-7:00 pm

2 stops39h 45m

$1,340

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 5/24

8:10 pm-6:30 pm

2 stops38h 20m

Trieste Ronchi dei Legionari

Mon 6/8

11:15 am-12:40 pm

2 stops33h 25m

$1,454

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 7/5

10:20 am-10:25 am

2 stops16h 05m

Trieste Ronchi dei Legionari

Sat 7/11

6:35 am-8:22 pm

2 stops21h 47m

$1,614
Quickest round-trip

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 4/27

11:15 am-10:25 am

2 stops15h 10m

Trieste Ronchi dei Legionari

Tue 5/5

6:35 am-5:55 pm

1 stop19h 20m

$1,616

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Best time to book a flight from Denver to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Denver to Trieste

What is the cheapest month to book a flight from Denver to Trieste?

Currently, April is the cheapest month in which you can book a flight from Denver to Trieste (average of $590). Flying from Denver to Trieste in June is currently the most expensive (average of $966). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Denver to Trieste. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Denver to Trieste?

    Airlines like Lufthansa fly from Denver to Trieste in about 20h 15m. The time it takes to get you to your destination can typically vary by up to . The distance between Denver and Trieste is about 5388 mi.

  • Can I find deals for flights from Denver to Trieste that include hotel bookings?

    Yes. In addition to deals on Denver to Trieste flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Trieste?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Trieste.

  • Can I find deals for business class flights from Denver to Trieste?

    Yes. Cheapflights offers flight deals from Denver to Trieste by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Denver to Trieste?

    Currently, April is the cheapest month in which you can book a flight from Denver to Trieste (average of $590). Flying from Denver to Trieste in June is currently the most expensive (average of $966). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Complete your trip

Complete your trip to Trieste by adding a car rental and/or hotel reservation to your travel itinerary.
Trieste car rentals
Venice Marco Polo Airport car rentals
Trieste Ronchi dei Legionari Airport car rentals
Venice Treviso A. Canova Airport car rentals

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
Cookie settings©2026 Cheapflights